Engine governor



July 29, 1947. M. MALLORY ENGINE GOVERNOR Original Filed June 8, 1942 IN V EN TOR.

Mar/0n Mafia/y Patented July 29, 1947 UNITED STATES PATENT OFFICE ENGINE GOVERNOR Marion Mallory, Detroit, Mich.

6 Claims.

This invention relates to a governor for controlling the speed of an internal combustion engine.

It is the object of this invention to produce a governor for controlling the speed of an internal combustion engine which is considerably more efficient in operation and more simple than governors heretofore known.

This invention contemplates an engine governor which will control the speed of an internal combustion engine at any predetermined desired speed with greater precision and nicety than heretofore possible.

The figure of the drawing shows an elevation partly in section of my engine speed governor.

l is a governor housing, 2 the inlet and 3 the outlet. 4 is a valve mounted on shaft 5 and journaled in housing I. 6 is an arm fixed on shaft 5. l is a tension spring connected to one end of arm 6 and to housing I. 8 is a suction device provided with a flexible diaphragm 9 which is connected by rod ID with arm 5. l l is the suction chamber of suction device 8. i2 is the at mospheric chamber of suction device 8. i3 is an atmospheric opening into chamber l2. I4 is a conduit connected'to suction chamber ll and to orifice l5 located in governor housing i. it is a conduit connected to orifice I! in governor housing I. I8 is an adjusting valve in conduit l6.

I9 is a suction device connected by conduit 20 to Operation of the device It will be understood that the governor housing l is part of the intake passageway of the internal combustion engine and that the charge flow is downwardly. Assuming that the engine is running at low speed, spring 24 will hold valve 28 open thereby air bleeding the suction chamber H through conduit l4 and orifice 3| to atmosphere. If the speed of the engine increases, the velocity of the fluid flow through venturi 22 increases thereby increasing the venturi suction at orifice 23 which is impressed upon diaphragm 25. Spring 24 is adjusted to yield to the pull or force of the venturi suction on diaphragm 25 when the engine reaches a certain speed thereby causing valve 26 to close air bleed orifice 3 i. Thevelocity of the charge by orifices l5 and I! will create a sufficient suction to start governor valve 4 toward closed position. As this valve moves slightly toward closed position the suction below it or on the engine side of valve 4 will greatly in crease thereby increasing the suction in chamber l l of the suction device which acts on diaphragm t to pull valve 4 toward a closed position to give the desired governing of the engin speed. As Valve 4 moves toward a closed position, which greatly increases the suction at orifice l1, orifice v5 then begins to be an air bleed to suction device 8 which prevents a sudden closing or plastering of valve 4. If the engine speed should slow down below the governed speed, spring 24 will open valve 26 thereby air bleeding suction cham ber II to atmosphere. Spring 1 will then move valve 4 toward an open position but as it does so the charge will speed up by orifice l5 and orifice !5 will become a suction device when valve 4 becomes wide open. In other words, orifice i5 gradually changes from an air bleed orifice to a suction orifice as valve 4 moves toward an open position. This prevents valve 4 from flying open too rapidly. The orifice l5 functioning as it does prevents the well-known surging in the speed of governor controlled engines.

As soon as the engine speed is high enough to create suificient suction at orifice 23, valve 26 will snap closed, causing valve i-to close. The suction will immediately drop at orifice 23 but will increase at orifice ll, which will tend to hold valve 26 away from its seat. The speed of the air by orifice 23 tends to close valve 26 and the vacuum in conduit l4 created by the closing of valve 4 tends to open valve 2 6. In other words, valve 25 rides the vacuum.

This application is a'division of application Serial No. 446,243 which was filed June 8, 1942, and which has now matured into Patent No. 2,356,679.

In the claims the phrase downstream side of the throttle valve means the engine side of the same and the phrase upstream side of the throttle valve means the atmosphere side of the throttle valve.

I claim:

1. In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow of motive fluid to the engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valve for imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downstream side of said throttle valve, the improvement comprising a fluid bleed for changing the effective pressure at said above pressure actuated means, a valve controlling said fluid .bleed, and means actuated through changes of pressure created by changes in the velocity of the fluid fiowing through said intake passageway on the upstream side of said throttle valve for imparting movement to said fluid bleed valve, said latter means moving said fluid bleed valve towards closed position when the fluid flowing through said intake passageway reaches a velocity whereby said first'mentione'd pressure actuated means moves said throttle valve toward closed position.

2. In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow of motive fluid to the engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valve for imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downstream side of said throttle valve, the improvement comprising a fluid bleed for changing the effective pressure at said above pressure actuated means, a valve controlling said fluid bleed, a venturi in said intake passageway on the upstream side of said throttle valve, and means actuated through changes of pressure created by changes in the velocity of the fluid flowing through said venturi, a conduit connecting said venturi with said last mentioned means whereby said last mentioned means moves said fluid bleed valve toward closed position when the fluid flowing through said venturi reaches a predetermined velocity and the first mentioned pressure actuated means moves said throttle valve toward closed position to control the flow of motive fluid through said intake passageway 3. In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow of motive fluid to the engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valve for imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downsteam side of said throttle valve, the improvement comprising a second conduit connecting said above pressure actuated means with the intake passageway on the upstream side of said throttle valve, an air bleed to atmosphere for said above pressure actuated means, a valve controlling said air bleed, and means actuated through changes of pressure created by changes in the velocity of the fluid flowing through said intake passageway on the upstream side of said throttle valve for imparting movement to said air bleed valve, said latter means moving said air bleed valve towards closed position when the fluid flowing through said intake passageway reaches a predetermined velocity whereby said first mentioned pressure actuated means moves said throttle valve toward closed position.

4; In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow'of motive fluid to the engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valvefor imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downstream side of said throttle valve, the improvement comprising a second conduit connecting said above pressure actuated means with the intake. passageway on the upstream side of said throttle valve, an air bleed to atmosphere 'for said above. pressure actuated means, a valve controlling said air bleed, a venturi in said intake passageway on the .upstream side of said throttle valve, and means actuated through changes of pressure created by changes in the velocity of the fluid flowing through said venturi, a conduit connecting 1 venturi with said last mentioned means whereby" said last mentioned means moves said air bleed valve toward closed position when the fluid flowing through said venturi reaches a predetermined velocity and the first mentioned pressure actuated means moves said throttle valve toward closed position to control the flow of motive fluid through said intake passageway.

5. In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow of motive fluid to the engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valve for imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downstreamside of said throttle valve, the improvement comprising an air bleed to atmosphere for said above pressure actuated means, a valve controlling said air bleed, said valve closing against the flow of air through said air bleed into said above pressure actuated means, and means actuated through changes of pressure created by changes in the velocity of the fluid flowing through said intake passageway on the upstream side of said throttle valve for imparting movement to said air bleed valve, said latter means moving said air bleed valve towards closed position in opposition to the vacuum existing in said conduit when the fluid flowing through said intake passageway reaches a predetermined velocity whereby said first mentioned pressure actuated means moves said throttle valve toward closed position.

6. In an internal combustion engine having an intake passageway provided with a throttle valve for controlling the flow of motive fluid to the 1 engine, means actuated through changes in pressure in the intake passageway on the downstream side of said throttle valve for imparting movement to said throttle valve, and a conduit connecting said above pressure actuated means with the intake passageway on the downstream side of said throttle valve, the improvement comprising an air bleed to atmosphere for said above pressure actuated means, a valve controlling said air bleed, said valve closing against the flow of air through said air bleed into said above pressure actuated means, resilient means urging said valve toward open position, and means actuated through changes of pressure created by changes in the velocity of the fluid flowing through said intake passageway on the upstream side of said throttle valve for imparting movement to said air bleed valve, said latter means moving said air bleed valve towards closed position in opposition to said resilient means and the vacuum existing in said conduit when the fluid flowing through said intake passageway reaches a predetermined velocity whereby said first mentioned pressure actuated means moves said throttle valve toward closed position.

MARION MALLORY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,326,791 Meade Aug. 1'7, 1943 1,702,820 Dunn et al Feb. 19, 1929 2,187,653 Jennings, Jr. Jan. 16, 1940 2,216,240 Kemp Oct. 1, 1940 1,712,166 Plaut May 7, 1929 Certificate of Correction Patent No. 2,424,836. July 29, 1947.

' MARI-ON MALLORY It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Column 3, line 1, claim 1, before the Word velocity insert predetermined; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 21st day of October, A. D. 1947 THOMAS F. MURPHY,

Assistqnt Commissioner of Patents. 

